<template>
  <div class="loginContainer">
    <div class="loginInner">
      <div class="login_header">
        <h2 class="login_logo">美团外卖</h2>
        <div class="login_header_title">
          <a href="javascript:;" :class="{on:loginWay}" @click="loginWay=true">短信登录</a>
          <a href="javascript:;" :class="{on:!loginWay}" @click="loginWay=false">密码登录</a>
        </div>
      </div>
      <div class="login_content">
        <form @submit.prevent="login">
          <div :class="{on:loginWay}">
            <section class="login_message">
              <input type="tel" maxlength="11" placeholder="手机号" v-model="phone">
              <button :disabled="!rightPhone" class="get_verification" :class="{right_phone:rightPhone}" @click.prevent="getCode">
                {{computeTime>0? `已发送(${computeTime}s)`:'获取验证码'}}
              </button>
            </section>
            <section class="login_verification">
              <input type="text" maxlength="8" placeholder="验证码" v-model="code">
            </section>
            <section class="login_hint">
              温馨提示：未注册硅谷外卖帐号的手机号，登录时将自动注册，且代表已同意
              <a href="javascript:;">《用户服务协议》</a>
            </section>
          </div>
          <div :class="{on:!loginWay}">
            <section>
              <section class="login_message">
                <input type="text" maxlength="11" placeholder="手机/邮箱/用户名" v-model="name">
              </section>
              <section class="login_verification">
                <input type="text" placeholder="密码" v-if="showPsw" v-model="pwd">
                <input type="password" placeholder="密码" v-else v-model="pwd">

                <div class="switch_button " :class="showPsw?'on':'off'" @click="showPsw=!showPsw">
                  <div class="switch_circle" :class="{right:showPsw}"></div>
                  <span class="switch_text">{{showPsw?'abc':'...'}}</span>
                </div>

              </section>
              <section class="login_message">
                <input type="text" maxlength="11" placeholder="验证码" v-model="captcha" >
                <img ref="captcha" class="get_verification" src="http://localhost:4000/captcha" alt="captcha"  @click="getCaptcha">
              </section>
            </section>
          </div>
          <input type="submit" value="登录" class="login_submit"></input>
        </form>
        <a href="javascript:;" class="about_us">关于我们</a>
      </div>
      <span href="javascript:" class="go_back" @click="$router.back()">
        <i class="iconfont icon-jiantou2"><</i>
      </span>
    </div>
    <AlertTip :alertText="alertText" v-show="alertShow" @closeTip="closeTip"></AlertTip>
  </div>
</template>

<script>
  import AlertTip from '../../components/AlertTip/AlertTip'
  import {reqSendCode,reqSmsLogin,reqPwdLogin} from '../../api'
    export default {
        name: "Login",
      data() {
        return {
          loginWay:true, //登录切换
          phone:'',
          showPsw:false,//显示密码
          computeTime:0, //倒计时
          pwd:'',//密码
          code:'',//短信验证码
          name:'',//用户名
          captcha:'',//验证码
          alertText:'',//提示文本
          alertShow:false,//显示提示框
        }
      },
      methods:{
        async getCode(){
          //倒计时效果

          if (!this.computeTime) {
            this.computeTime = 30
            this.intervalId = setInterval(()=>{
              this.computeTime--
              if (this.computeTime<=0){
                clearInterval(this.intervalId)
              }
            },1000)
            //向指定手机发送验证码，ajax请求
          }
         const res = await  reqSendCode(this.phone)
          if (res.code === 1){
            //失败提示
            this.showAlert(res.msg)
            //停止倒计时
            if (this.computeTime){
              this.computeTime = 0
              clearInterval(this.intervalId)
              this.intervalId = null
            }
          }
        },

        //显示提示框的方法
        showAlert(alertText){
          this.alertShow = true
          this.alertText = alertText
        },
        //异步登录
       async login(){
          let res
         //前台表单验证
          if (this.loginWay) {   //短信登录
            const {rightPhone,phone,code} = this
            if (!this.rightPhone){
                this.showAlert('手机号不正确')
              return
            }
            else if(!/^\d{6}$/.test(code)){
              //验证码错误
              this.showAlert('验证码不正确')
              return
            }
            //发送ajax请求短信登录
            res = await reqSmsLogin(phone,code)

          }else { //密码登录
            const {name,pwd,captcha} = this
            if (!this.name){
              //必须指定用户名
              this.showAlert('必须指定用户名')
              return
            }
            else if(!this.pwd){
              //必须指定密码
              this.showAlert('必须指定密码')
              return
            }
            else if(!this.captcha){
              //必须指定验证码
              this.showAlert('必须指定验证码')
              return
            }
            //发送ajax请求短信登录
           res = await reqPwdLogin({name,pwd,captcha})
          }

          //请求处理
         if (res.code === 0){
           const user = res.data
           console.log(user);
           //将user info保存到vuex state中
           this.$store.dispatch('recordUser',user)
           //去个人中心界面
           this.getCaptcha()
           this.$router.replace('/profile')

         } else {
           const msg = res.msg
           this.getCaptcha()
           this.showAlert(msg)
           this.captcha = ''
         }

        },
        //关闭提示框
        closeTip(){
          this.alertShow = false
          this.alertText = ''
        },
        //获取图片验证码
        getCaptcha(){
          //图形验证码更新
          this.$refs.captcha.src = 'http://localhost:4000/captcha?time='+Date.now()  //直接加路径不行event.target.src = 'http://localhost:4000/captcha'，因为请求地址要有变化才刷新
        }
      },
      computed:{
        rightPhone(){
          return /^1\d{10}$/.test(this.phone)
        }
      },
      components:{
          AlertTip
      }
    }
</script>

<style scoped lang="stylus" rel="stylesheet/stylus">
  @import "../../common/stylus/mixins.styl"
  .loginContainer
    width 100%
    height 100%
    background #fff
    .loginInner
      padding-top 8px
      width 80%
      margin 0 auto
      .login_header
        .login_logo
          font-size 40px
          font-weight bold
          color #02a774
          text-align center

        .login_header_title
          display flex
          padding-top 7px
          text-align center
          > a
            text-decoration none
            color #333
            font-size 14px
            padding-bottom 4px
            &:first-child
              margin 0 40px
            &.on
              color #02a774
              font-weight 700
              border-bottom 2px solid #02a774
      .login_content
        > form
          > div
            display none
            &.on
              display block
            input
              width 100%
              height 100%
              padding-left 10px
              box-sizing border-box
              border 1px solid #ddd
              border-radius 4px
              outline 0
              font 400 14px Arial
              &:focus
                border 1px solid #02a774
            .login_message
              position relative
              margin-top 16px
              height 48px
              font-size 14px
              background #fff
              .get_verification
                position absolute
                top 50%
                right 10px
                transform translateY(-50%)
                border 0
                color #ccc
                font-size 14px
                background transparent
                &.right_phone
                color black
                &.right_phone_number
                  color #000
            .login_verification
              position relative
              margin-top 16px
              height 48px
              font-size 14px
              background #fff
              .switch_button
                font-size 12px
                border 1px solid #ddd
                border-radius 8px
                transition background-color .3s, border-color .3s
                padding 0 6px
                width 30px
                height 16px
                line-height 16px
                color #fff
                position absolute
                top 50%
                right 10px
                transform translateY(-50%)
                &.off
                  background #fff
                  .switch_text
                    float right
                    color #ddd
                &.on
                  background #02a774
                > .switch_circle
                  position absolute
                  top -1px
                  left -1px
                  width 16px
                  height 16px
                  border 1px solid #ddd
                  border-radius 50%
                  background #fff
                  box-shadow 0 2px 4px 0 rgba(0, 0, 0, .1)
                  transition transform .3s
                  &.right
                    transform translateX(27px)

            .login_hint
              margin-top 12px
              color #999
              font-size 14px
              line-height 20px
              > a
                color #02a774
          .login_submit
            display block
            width 100%
            height 42px
            margin-top 30px
            border-radius 4px
            background #4cd96f
            color #fff
            text-align center
            font-size 16px
            line-height 42px
            border 0
        .about_us
          display block
          font-size 12px
          margin-top 20px
          text-align center
          color #999
      .go_back
        position absolute
        top 5px
        left 5px
        width 30px
        height 30px
        > .iconfont
          font-size 20px
          color #999
</style>
